Dr. Jonathan Y.

Why do some children have difficulty with rotational symmetry? What methods canyou use to help them understand rotational symmetry? How can you explain this to students?

College level? And where should you invent gadgets? What are some gadets we need in electrical engineering that if one invented, that person will earn lots of money? If invented, how much money can... more

 have no clue what I am doing. it is summer and I forgot how to do this because it was earlier in the year.

lg(N^2+1)===??????????????? simplify   lg(N^2+1)/lgN    ===?????????   lg x/lg y===lg x - lg y              (right or wrong ??????????)             Please simplify this equation 

find the y-intercept for: x+3y=7

i need the answers plse